package com.cc.pureCoffee.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.cc.pureCoffee.common.R;
import com.cc.pureCoffee.entity.Employee;
import com.cc.pureCoffee.mapper.EmployeeMapper;
import com.cc.pureCoffee.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

/**
 * <p>
 * 管理员工服务实现类
 * </p>
 *
 * @author 郑梓聪
 * @since 2022-06-20
 */
@Slf4j
@Service
public class EmployeeServiceImpl extends ServiceImpl<EmployeeMapper, Employee> implements EmployeeService {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @Transactional
    @Override
    public R<Object> login(HttpServletRequest request, Employee employee) {
        //1.将页面提交的密码password进行md5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没有查询到则返回登陆失败结果
        if (emp == null) {
            return R.error("登陆失败：用户名错误！");
        }

        //4.密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登陆失败：密码错误！");
        }

        //5.查看员工状态，如果已禁用状态，则返回员工已禁用
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用！");
        }

        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     *
     * @param request
     * @return
     */
    @Override
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存的当前登录员工id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功！");
    }

    /**
     * 新增员工
     *
     * @param employee
     * @return
     */
    @Transactional
    @Override
    public R<String> save(HttpServletRequest request, Employee employee) {
        log.info("新增员工，员工信息：{}", employee.toString());
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //获得当前登录用户的id
//        Long empID = (Long) request.getSession().getAttribute("employee");

//        employee.setCreateUser(empID);
//        employee.setUpdateUser(empID);

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工信息查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @Transactional
    @Override
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page = {}，pageSize = {},name = {}", page, pageSize, name);

        //构造分页条件
        Page pageInfo = new Page(page, pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加一个过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 员工信息更新
     *
     * @param employee
     * @return
     */
    @Transactional
    @Override
    public R<String> update(HttpServletRequest request, Employee employee) {
        log.info(employee.toString());

        long id = Thread.currentThread().getId();
        log.info("线程id为{}", id);

        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功！");
    }

    /**
     * 根据id查询员工信息
     *
     * @param id
     * @return
     */
    @Transactional
    @Override
    public R<Employee> findById(Long id) {
        log.info("根据id查询员工信息...");
        if (id != null) {
            return R.success(employeeService.getById(id));
        }
        return R.error("没有查询到对应员工信息！");
    }


}
